tracing: Report wrong dynamic event command

tracing: Report wrong dynamic event command

Report wrong dynamic event type in the command via error_log.
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 # echo "z hoge" > /sys/kernel/tracing/dynamic_events
 sh: write error: Invalid argument
 # cat /sys/kernel/tracing/error_log
 [   22.977022] dynevent: error: No matching dynamic event type
   Command: z hoge
            ^
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Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/176278970056.343441.10528135217342926645.stgit@devnote2
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>